I have a blackshoulder peahen that had a really BAD leg. She couldn't walk at all so her only means of moving was dragging herself on the ground. I amputated her leg and now she's better than ever. I don't see any reason why you should put her down bc of 1 bad leg. Here is a pic of faith my black shoulder peahen
http://i61.photobucket.com/albums/h63/andyluvsnola/100_4744-1.jpg
http://i61.photobucket.com/albums/h63/andyluvsnola/100_4744-1.jpg